From d83ae009829b59cf6ccd38345ec872de1b03d993 Mon Sep 17 00:00:00 2001
From: Elias Batek <desisma@heidel.beer>
Date: Sun, 6 Oct 2024 00:00:42 +0200
Subject: [PATCH] Make the pure round()ing function private

---
 pixmappaint.d | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/pixmappaint.d b/pixmappaint.d
index 4d55d6c..3750ff1 100644
--- a/pixmappaint.d
+++ b/pixmappaint.d
@@ -20,13 +20,16 @@ module arsd.pixmappaint;
 import arsd.color;
 import arsd.core;
 
-private float hackyRound(float f) {
+private float roundImpl(float f) {
 	import std.math : round;
+
 	return round(f);
 }
 
-float round(float f) pure @nogc nothrow @trusted {
-	return (cast(float function(float) pure @nogc nothrow) &hackyRound)(f);
+// `pure` rounding function.
+// std.math.round() isn’t pure on all targets.
+private float round(float f) pure @nogc nothrow @trusted {
+	return (castTo!(float function(float) pure @nogc nothrow)(&roundImpl))(f);
 }
 
 /*